package com.atguigu.lease.web.admin.service.impl;

import com.atguigu.lease.common.constant.RedisConstant;
import com.atguigu.lease.common.exception.LeaseException;
import com.atguigu.lease.common.result.ResultCodeEnum;
import com.atguigu.lease.common.utils.JwtUtil;
import com.atguigu.lease.model.entity.SystemUser;
import com.atguigu.lease.model.enums.BaseStatus;
import com.atguigu.lease.web.admin.mapper.SystemUserMapper;
import com.atguigu.lease.web.admin.service.LoginService;
import com.atguigu.lease.web.admin.vo.login.CaptchaVo;
import com.atguigu.lease.web.admin.vo.login.LoginVo;
import com.atguigu.lease.web.admin.vo.system.user.SystemUserInfoVo;
import com.baomidou.mybatisplus.core.conditions.query.LambdaQueryWrapper;
import com.wf.captcha.SpecCaptcha;
import com.wf.captcha.base.Captcha;
import org.apache.commons.codec.digest.DigestUtils;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.data.redis.core.StringRedisTemplate;
import org.springframework.stereotype.Service;
import org.springframework.util.StringUtils;

import java.util.UUID;
import java.util.concurrent.TimeUnit;

@Service
public class LoginServiceImpl implements LoginService {

    @Autowired
    StringRedisTemplate stringRedisTemplate; // 使用字符串类型的模板类，不使用RedisTemplate

    @Autowired
    SystemUserMapper systemUserMapper;

    @Override
    public CaptchaVo getCaptcha() {
        SpecCaptcha specCaptcha = new SpecCaptcha(180,30,4);
        specCaptcha.setCharType(Captcha.TYPE_DEFAULT);
        String code = specCaptcha.text().toLowerCase(); //获取图片上的验证码文字
        String key = RedisConstant.ADMIN_LOGIN_PREFIX + UUID.randomUUID().toString();
        stringRedisTemplate.opsForValue().set(key,code,RedisConstant.ADMIN_LOGIN_CAPTCHA_TTL_SEC, TimeUnit.SECONDS);
        String base64ImageStr = specCaptcha.toBase64(); //使用Base64将图片转码，生成一个字符串。
        return new CaptchaVo(base64ImageStr,key);
    }

    @Override
    public String login(LoginVo loginVo) {
        //1.表单数据校验，是否为空   都需要验证是否为空
        if(!StringUtils.hasText(loginVo.getCaptchaCode())){
            throw new LeaseException(ResultCodeEnum.ADMIN_CAPTCHA_CODE_NOT_FOUND);
        }

        //2.验证验证码是否正确
        String key = loginVo.getCaptchaKey();
        String code = stringRedisTemplate.opsForValue().get(key);
        if(!StringUtils.hasText(code)){
            throw new LeaseException(ResultCodeEnum.ADMIN_CAPTCHA_CODE_EXPIRED);
        }
        if(!code.equals(loginVo.getCaptchaCode())){ //缓存验证码和提交登录验证码不一致，说明验证码输入错误。
            throw new LeaseException(ResultCodeEnum.ADMIN_CAPTCHA_CODE_ERROR);
        }

        //3.判断用户是否存在
        SystemUser systemUser = systemUserMapper.selectOne(new LambdaQueryWrapper<SystemUser>()
                .eq(SystemUser::getUsername, loginVo.getUsername()));
        if(systemUser == null){
            throw new LeaseException(ResultCodeEnum.ADMIN_ACCOUNT_NOT_EXIST_ERROR);
        }
        //4.判断账号是否被禁用
        if(systemUser.getStatus().equals(BaseStatus.DISABLE)){
            throw new LeaseException(ResultCodeEnum.ADMIN_ACCOUNT_DISABLED_ERROR);
        }

        //5.判断密码是否正确
        if(!systemUser.getPassword().equals(DigestUtils.md5Hex(loginVo.getPassword()))){
            throw new LeaseException(ResultCodeEnum.ADMIN_ACCOUNT_ERROR);
        }

        //6.生成JWT token令牌
        String token = JwtUtil.createToken(systemUser.getId(), systemUser.getUsername());

        //7.返回token
        return token;
    }

    @Override
    public SystemUserInfoVo getSystemUserInfoById(Long id) {
        SystemUser systemUser = systemUserMapper.selectById(id);
        SystemUserInfoVo systemUserInfoVo = new SystemUserInfoVo();
        systemUserInfoVo.setName(systemUser.getName()); //昵称   不是登录用户名称
        systemUserInfoVo.setAvatarUrl(systemUser.getAvatarUrl());
        return systemUserInfoVo;
    }
}
